CN220154523U - Three-phase multifunctional electric energy meter set with primary-secondary design - Google Patents
Three-phase multifunctional electric energy meter set with primary-secondary design Download PDFInfo
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- CN220154523U CN220154523U CN202222928173.2U CN202222928173U CN220154523U CN 220154523 U CN220154523 U CN 220154523U CN 202222928173 U CN202222928173 U CN 202222928173U CN 220154523 U CN220154523 U CN 220154523U
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Abstract
The utility model provides a three-phase multifunctional electric energy meter set with a primary-secondary design, which solves the problems of small network coverage range and the like of the electric energy meter set. The utility model has the advantages of large network coverage, stable structure and the like.
Description
Technical Field
The utility model belongs to the technical field of mechanical automation equipment, and particularly relates to a three-phase multifunctional electric energy meter set with a primary-secondary design.
Background
A three-phase electricity meter is an electricity meter that measures the electrical energy output (or load consumption) by a power supply in a three-phase ac circuit. The working principle of the three-phase electric energy meter is identical to that of a single-phase electric meter, and the three-phase electric energy meter is structurally measured by adopting a plurality of groups of driving components and a plurality of aluminum discs fixed on a rotating shaft. Through years of development of electronic electric energy meters, functions are more and more complex, user demands are more and more, and most electric energy meters with rich functions are huge in volume and high in price. In addition, in the actual use process, the integration level of the conventional three-phase ammeter is low, the network coverage range of the three-phase ammeter is small due to the conventional network connection structure, and for example, the multifunctional measurement requirement of the ammeter cannot be met by adopting a single concentrator.
In order to solve the defects existing in the prior art, long-term exploration is performed, and various solutions are proposed. For example, chinese patent literature discloses a mobile three-phase temporary electricity meter box [201310108981.7] that includes a box, an incoming switch, an outgoing switch, a three-phase four-wire fee intelligent electric energy meter, and a three-phase four-wire outlet. The box body comprises a rear plate and a frame, wherein the outer side of the rear plate is provided with a hoop device, and the hoop device comprises a mounting bracket fixed on the outer side surface of the rear plate, and a bracket and a round hoop which are sequentially connected to the rear part of the mounting bracket through a pair of bolts; the inside of the box body is divided into an upper bin and a lower bin by a partition plate, the right side of the front face of the upper bin is hinged with an upper bin door, and the right side of the front face of the lower bin is hinged with a lower bin door; the wire inlet switch and the three-phase four-wire fee intelligent electric energy meter are arranged in the upper bin of the box body left and right; the outlet switch and the three-phase four-wire socket are arranged in the lower bin of the box body left and right.
The scheme solves the problem that the three-phase ammeter is overlarge in size to a certain extent, but the scheme still has a plurality of defects, such as smaller network coverage, incapability of meeting the multifunctional use requirements and the like.
Disclosure of Invention
The utility model aims to solve the problems and provides a three-phase multifunctional electric energy meter set which is reasonable in design and has a larger network coverage range and a mother-son design.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a multi-functional electric energy meter group of three-phase of primary and secondary design, includes multi-functional electric energy meter of three-phase and multi-functional electric energy sub-table, and multi-functional electric energy meter of three-phase and multi-functional electric energy sub-table are inside to be provided with respectively based on Cortex-M0 kernel's MCU module, and multi-functional electric energy meter of three-phase is inside to be provided with 4G module, and multi-functional electric energy meter of three-phase and multi-functional electric energy sub-table of three-phase pass through RS485 communication module interconnection and are equipped with the networking button of being connected with the MCU module respectively. The three-phase multifunctional electric energy master meter is characterized in that the concentrator can serve as an electric energy meter to realize two functions, the MCU module of the Cortex-M0 inner core is matched with the RS485 communication module to realize networking of a plurality of three-phase multifunctional electric energy sub-meters and the three-phase multifunctional electric energy master meter, the signal coverage range of the electric energy meter is enlarged, a networking button is pressed, and the MCU module of the Cortex-M0 inner core drives the RS485 communication module to realize one-key networking.
In the above-mentioned three-phase multifunctional electric energy meter set of primary and secondary design, the inside 4G module of three-phase multifunctional electric energy meter is equipped with the SIM module, and three-phase multifunctional electric energy meter has the antenna that extends to outside and is connected with the 4G module. The SIM module is used for supporting the network connection of the 4G module, and the outward antenna solves the limitation of poor installation environment signals.
In the three-phase multifunctional electric energy meter set with the primary-secondary design, a wireless communication module of U9300C type is selected as a 4G module, and DLT645-2007 application protocol is adopted. The 4G module adopts DLT645-2007 application protocol, which is convenient for users to dock with own or public systems.
In the three-phase multifunctional electric energy meter set with the primary-secondary design, a power module and a standby battery are respectively arranged inside the three-phase multifunctional electric energy meter set and the three-phase multifunctional electric energy meter set, the power module adopts a power management chip of LM2596 model, and the standby battery adopts a CR2032 battery and is externally connected with mains supply through an MCU module. The independent power supply improves the operation stability of the ammeter and ensures the networking stability in the power-off state.
In the three-phase multifunctional electric energy meter set with the primary-secondary design, the MCU module and the standby battery adopt isolating switches and are provided with external wiring terminals. The external wiring terminal is convenient for external wiring power supply, and can jointly supply energy in various modes.
In the three-phase multifunctional electric energy meter set with the primary-secondary design, an LED indication module and an LCD display module are respectively arranged in the three-phase multifunctional electric energy meter and the three-phase multifunctional electric energy meter, and the LED indication module is provided with a power supply indication lamp, a network connection indication lamp and a voltage/current sampling indication lamp. The LED indication module and the LCD display module have good indication effect, and are convenient for viewing or adjusting ammeter parameters on site.
In the three-phase multifunctional electric energy meter set with the primary-secondary design, the three-phase multifunctional electric energy meter and the MCU module inside the three-phase multifunctional electric energy meter are connected with the voltage/current sampling module through the metering unit module, and the voltage/current sampling module adopts an analog-to-digital converter of DAM3918 model. The analog-to-digital converter of the DAM3918 model has high current/voltage detection accuracy.
In the three-phase multifunctional electric energy meter set with the primary-secondary design, 90A magnetic latching relays connected with the MCU module are respectively arranged inside the three-phase multifunctional electric energy meter and the three-phase multifunctional electric energy meter. The on-off of current is controlled by a 90A magnetic latching relay, so that overvoltage, overcurrent and overload protection are realized.
In the three-phase multifunctional electric energy meter set with the primary-secondary design, a storage module connected with the MCU module is respectively arranged inside the three-phase multifunctional electric energy meter and the three-phase multifunctional electric energy meter, and the storage module adopts an SD card memory. The storage module temporarily stores the collected data, and the pluggable SD card facilitates data migration.
In the three-phase multifunctional electric energy meter set with the primary-secondary design, an AES128 encryption algorithm is built in the MCU module. And the AES128 encryption algorithm is adopted to encrypt and transmit the important parameters, so that the data security is ensured.
Compared with the prior art, the utility model has the advantages that: the electric energy meter group with the primary-secondary structure can realize one-key networking through the 4G module and the RS485 communication module, thereby expanding the network coverage of the electric energy meter group and meeting the monitoring requirement of a multifunctional circuit; an independent power supply module and a standby battery are provided, and the power supply is flexibly switched by a power management chip of model LM 2596; the primary and secondary ammeter is internally provided with a 90A magnetic latching relay respectively, so that a complex time control strategy can be realized.
Drawings
FIG. 1 is an internal structural diagram of a three-phase multifunctional electric energy master meter of the present utility model;
FIG. 2 is an internal structural diagram of the three-phase multi-functional electric energy meter of the present utility model;
FIG. 3 is an external schematic view of a three-phase multi-functional power master meter of the present utility model;
FIG. 4 is a structural development view of the three-phase multifunctional electric energy master meter of the present utility model;
in the figure, a three-phase multifunctional electric energy mother meter 1, a three-phase multifunctional electric energy sub-meter 2, an MCU module 3, a 90A magnetic latching relay 31, a storage module 32, a 4G module 4, an RS485 communication module 5, a networking button 51, a SIM module 6, an antenna 61, a power supply module 7, a standby battery 71, an LED indication module 8, an LCD display module 81, a metering unit module 9 and a voltage/current sampling module 91.
Detailed Description
The utility model will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1-2, a three-phase multifunctional electric energy meter set with a primary-secondary design comprises a three-phase multifunctional electric energy meter 1 and a three-phase multifunctional electric energy meter 2 which are interconnected in a wired or wireless manner, wherein the three-phase multifunctional electric energy meter 1 and the three-phase multifunctional electric energy meter 2 generally adopt a plastic waterproof structure. The three-phase multifunctional electric energy master meter 1 and the three-phase multifunctional electric energy sub meter 2 are internally provided with MCU modules 3 based on Cortex-M0 cores respectively, and the MCU modules 3 of the Cortex-M0 cores support various compiling operations with lower power consumption and are widely applied to the technical fields of electronic measurement, intelligent control and the like. The three-phase multifunctional electric energy master meter 1 is internally provided with the 4G module 4 to realize data interaction of the cloud platform, wherein the three-phase multifunctional electric energy master meter 1 is also used as a concentrator and used for replacing an independent concentrator, and the network use cost is greatly reduced. Besides the 4G module 4, there are also WI-FI, 2G/3G, NB-IoT, wired network and other alternatives, but 4G has great advantages in terms of convenience of installation, universality of model coverage and comprehensive cost, and the limitation of poor signal of the installation environment is solved simultaneously by matching with the external antenna 61.
The MCU module 3 of Cortex-M0 kernel and the RS485 communication module 5 are combined to realize 1 band 32 at maximum, thereby reducing the use cost. The three-phase multifunctional electric energy mother meter 1 and the three-phase multifunctional electric energy sub-meter 2 are interconnected through the RS485 communication module 5 and are respectively provided with the networking button 51 connected with the MCU module 3, when the three-phase multifunctional electric energy mother meter 1 and the three-phase multifunctional electric energy sub-meter 2 are installed in place, the three-phase multifunctional electric energy sub-meter 2 is ensured to be in the network coverage of the three-phase multifunctional electric energy mother meter 1, after the networking button 51 is pressed down, the RS485 communication module 5 realizes quick network matching interconnection, and meanwhile, the three-phase multifunctional electric energy sub-meter 2 can be matched with the RS485 communication module 5 to carry out lower-level interconnection, so that the network coverage is further expanded. The adopted MQTT and basic TCP protocol are used as the protocols with wider use, and the method has the advantages of small butt joint difficulty, mature use scene and high friendliness. The method can be widely applied to the fields of house renting, factories, photovoltaic power generation, equipment timing control and the like.
As can be seen from fig. 1, the 4G module 4 inside the three-phase multifunctional electric energy mother meter 1 is equipped with a SIM module 6 supporting esims and Micro SIMs. The SIM module 6 supports the 4G module 4, while the 4G module 4 is connected to the antenna 61 to meet local communication requirements. The large-scale networking can be realized only by arranging one SIM module 6 in the three-phase multifunctional electric energy master meter 1. Besides, the SIM module 6 adopts super SIM card to realize network communication and data storage, and further compresses the volume structure of the three-phase multifunctional electric energy master meter 1.
As shown in fig. 4, the three-phase multifunctional electric energy master meter 1 is internally provided with an independent cavity for accommodating the 4G module 4, so that the interference of the 4G module 4 is reduced. The 4G module 4 is a wireless communication module of U9300C model and adopts DLT645-2007 application protocol. The 4G module 4, the SIM module 6 and the antenna 61 are integrated into independent module elements, the module elements are assembled in a modularized mode according to actual needs, and therefore functional interchange of the three-phase multifunctional electric energy master meter 1 and the three-phase multifunctional electric energy sub meter 2 can be achieved.
Further, the three-phase multifunctional electric energy master meter 1 and the three-phase multifunctional electric energy sub meter 2 are internally provided with a power supply module 7 and a standby battery 71 respectively for supplying power to the MCU module 3, the power supply module 7 adopts a power management chip of LM2596 model to control the current supply of the MCU module 3 and the 4G module 4, and the standby battery 71 adopts a CR2032 battery and is externally connected with the mains supply through the MCU module 3. The power modules 7 of the three-phase multifunctional electric energy master meter 1 and the three-phase multifunctional electric energy sub meter 2 are generally in parallel connection, and are provided with corresponding regulated currents to ensure the stability of the system.
Furthermore, the MCU module 3 and the standby battery 71 adopt an isolating switch and have external connection terminals without electric shock hidden trouble, wherein the MCU module 3 and the RS485 communication module 5 are directly connected without intermediate devices, the baud rate is not affected by the intermediate devices and is reduced, and the 115100 baud rate can be supported at maximum.
As shown in fig. 1 to 4, the three-phase multifunctional electric energy mother meter 1 and the three-phase multifunctional electric energy sub-meter 2 are internally provided with an LED indication module 8 and an LCD display module 81 respectively, wherein the LED indication module 8 is provided with a power supply indication lamp, a network connection indication lamp and a voltage/current sampling indication lamp. The external LCD display module 81 is matched with an operation interface to carry out parameter adjustment, or the 4G module 4 is utilized to realize remote control of the mobile terminal on the ammeter group.
Meanwhile, the MCU module 3 inside the three-phase multifunctional electric energy mother meter 1 and the three-phase multifunctional electric energy sub meter 2 is connected with the voltage/current sampling module 91 through the metering unit module 9, the voltage/current sampling module 91 adopts an analog-to-digital converter of DAM3918 model, supports 12-bit analog quantity input, isolates an RS485 communication module 5 interface and has a standard Modbus RTU protocol.
It is visible that the three-phase multifunctional electric energy master meter 1 and the three-phase multifunctional electric energy sub meter 2 are internally provided with a 90A magnetic latching relay 31 connected with the MCU module 3 respectively to realize a time control function, and different time control strategies are formulated according to the required time period.
Obviously, the three-phase multifunctional electric energy master meter 1 and the three-phase multifunctional electric energy sub meter 2 are internally provided with a storage module 32 connected with the MCU module 3 respectively, and the storage module 32 stores data by adopting an SD card memory. The storage modules 32 inside the three-phase multifunctional electric energy master meter 1 and the three-phase multifunctional electric energy sub meter 2 can realize decentralized storage, so that the data storage safety is ensured.
Preferably, the three-phase multifunctional electric energy master meter 1 and the three-phase multifunctional electric energy sub meter 2 can realize multiple electric quantity combination modes, the MCU module 3 is internally provided with an AES128 encryption algorithm for carrying out encryption transmission on recharging, threshold modification, mode modification and zero clearing, and the encryption module inside the MCU module 3 can be closed for the environment with low requirements.
In summary, the principle of this embodiment is as follows: the three-phase multifunctional electric energy master meter 1 and the three-phase multifunctional electric energy meter 2 are internally provided with the directly connected MCU module 3 and the RS485 communication module 5 respectively, meanwhile, the MCU module 3 adopts a Cortex-M0 kernel to meet the networking requirement of 1 band 32, and one-key networking can be realized by long-time pressing of a networking button 51, so that the electric energy meter set has a larger network coverage range.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Although terms such as the three-phase multifunctional electric power master meter 1, the three-phase multifunctional electric power sub-meter 2, the MCU module 3, the 90A magnetic latching relay 31, the storage module 32, the 4G module 4, the RS485 communication module 5, the networking button 51, the SIM module 6, the antenna 61, the power module 7, the backup battery 71, the LED indication module 8, the LCD display module 81, the metering unit module 9, the voltage/current sampling module 91, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.
Claims (7)
1. The utility model provides a multi-functional electric energy meter group of three-phase of primary and secondary type design, includes multi-functional electric energy mother meter of three-phase (1) and multi-functional electric energy sub-table of three-phase (2), its characterized in that, multi-functional electric energy mother meter of three-phase (1) and multi-functional electric energy sub-table of three-phase (2) inside be provided with MCU module (3) based on Cortex-M0 kernel respectively, multi-functional electric energy mother meter of three-phase (1) inside be provided with 4G module (4), multi-functional electric energy mother meter of three-phase (1) and multi-functional electric energy sub-table of three-phase (2) interconnect and be equipped with networking button (51) that are connected with MCU module (3) respectively through RS485 communication module (5); the 4G module (4) is a wireless communication module of U9300C model and adopts DLT645-2007 application protocol; the three-phase multifunctional electric energy master meter (1) and the three-phase multifunctional electric energy meter (2) are internally provided with an LED indication module (8) and an LCD display module (81) respectively, wherein the LED indication module (8) is provided with a power supply indication lamp, a network connection indication lamp and a voltage/current sampling indication lamp; the MCU module (3) is internally provided with an AES128 encryption algorithm.
2. A three-phase multifunctional electric energy meter set of a sub-master design according to claim 1, characterized in that the 4G module (4) inside the three-phase multifunctional electric energy meter (1) is equipped with a SIM module (6), the three-phase multifunctional electric energy meter (1) having an antenna (61) extending to the outside and connected with the 4G module (4).
3. The three-phase multifunctional electric energy meter set with the primary-secondary design according to claim 1, wherein a power module (7) and a standby battery (71) are respectively arranged in the three-phase multifunctional electric energy meter set (1) and the three-phase multifunctional electric energy meter set (2), the power module (7) adopts a power management chip of model LM2596, and the standby battery (71) adopts a CR2032 battery and is externally connected with mains supply through an MCU module (3).
4. A three-phase multifunctional electric energy meter set designed as a master-slave type according to claim 3, characterized in that the MCU module (3) and the backup battery (71) are isolated switches and have external connection terminals.
5. The three-phase multifunctional electric energy meter set designed according to the primary and secondary type of claim 1, characterized in that the MCU module (3) inside the three-phase multifunctional electric energy meter (1) and the three-phase multifunctional electric energy meter (2) is connected with the voltage/current sampling module (91) through the metering unit module (9), and the voltage/current sampling module (91) adopts an analog-to-digital converter of model DAM 3918.
6. The three-phase multifunctional electric energy meter set designed by the primary and secondary type according to claim 1 is characterized in that 90A magnetic latching relays (31) connected with the MCU module (3) are respectively arranged in the three-phase multifunctional electric energy meter set (1) and the three-phase multifunctional electric energy meter set (2).
7. The three-phase multifunctional electric energy meter set with the primary-secondary design according to claim 1 is characterized in that a storage module (32) connected with the MCU module (3) is respectively arranged inside the three-phase multifunctional electric energy meter (1) and the three-phase multifunctional electric energy meter (2), and the storage module (32) adopts an SD card memory.
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| CN202222928173.2U CN220154523U (en) | 2022-10-31 | 2022-10-31 | Three-phase multifunctional electric energy meter set with primary-secondary design |
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| CN202222928173.2U CN220154523U (en) | 2022-10-31 | 2022-10-31 | Three-phase multifunctional electric energy meter set with primary-secondary design |
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